| |
| #ifndef BOOST_MPL_MATH_IS_EVEN_HPP_INCLUDED |
| #define BOOST_MPL_MATH_IS_EVEN_HPP_INCLUDED |
| |
| // Copyright Aleksey Gurtovoy 2000-2004 |
| // |
| // Distributed under the Boost Software License, Version 1.0. |
| // (See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| // |
| // See http://www.boost.org/libs/mpl for documentation. |
| |
| // $Id: is_even.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ |
| // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ |
| // $Revision: 49267 $ |
| |
| #include <boost/mpl/bool.hpp> |
| #include <boost/mpl/aux_/na_spec.hpp> |
| #include <boost/mpl/aux_/lambda_support.hpp> |
| #include <boost/mpl/aux_/config/msvc.hpp> |
| #include <boost/mpl/aux_/config/workaround.hpp> |
| |
| namespace boost { namespace mpl { |
| |
| #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) |
| namespace aux |
| { |
| template <class N> |
| struct is_even_base |
| { |
| enum { value = (N::value % 2) == 0 }; |
| typedef bool_<value> type; |
| }; |
| } |
| #endif |
| |
| template< |
| typename BOOST_MPL_AUX_NA_PARAM(N) |
| > |
| struct is_even |
| #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) |
| : aux::is_even_base<N>::type |
| #else |
| : bool_<((N::value % 2) == 0)> |
| #endif |
| { |
| BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_even,(N)) |
| }; |
| |
| BOOST_MPL_AUX_NA_SPEC(1, is_even) |
| |
| }} |
| |
| #endif // BOOST_MPL_MATH_IS_EVEN_HPP_INCLUDED |